Jquery – How to disable a button on a jQuery UI dialog

jqueryjquery-uijquery-ui-dialog

How do I go about disabling a button on the jQuery UI dialog. I can't seem to find this in any of the documentation in the link above.

I have 2 buttons on the modal confirmation ("Confirm" and "Cancel"). In certain cases, I want to disable the "Confirm" button.

Best Solution

Looks like anyone, even in this linked question, have proposed this solution, similar to the first part of the answer given by Nick Craver:

$("#dialog").dialog({
    width: 480,
    height: "auto",
    buttons: [
        {
            id: "button-cancel",
            text: "Cancel",
            click: function() {
                $(this).dialog("close");
            }
        },
        {
            id: "button-ok",
            text: "Ok",
            click: function() {
                $(this).dialog("close");
            }
        }
    ]
});

Then, elsewhere, you should be able to use the API for the jquery UI button:

$("#button-ok").button("disable");

Related Solutions

Javascript – How to check if an element is hidden in jQuery

Since the question refers to a single element, this code might be more suitable:

// Checks CSS content for display:[none|block], ignores visibility:[true|false]
$(element).is(":visible");

// The same works with hidden
$(element).is(":hidden");

It is the same as twernt's suggestion, but applied to a single element; and it matches the algorithm recommended in the jQuery FAQ.

We use jQuery's is() to check the selected element with another element, selector or any jQuery object. This method traverses along the DOM elements to find a match, which satisfies the passed parameter. It will return true if there is a match, otherwise return false.

Javascript – Setting “checked” for a checkbox with jQuery

Modern jQuery

Use .prop():

$('.myCheckbox').prop('checked', true);
$('.myCheckbox').prop('checked', false);

DOM API

If you're working with just one element, you can always just access the underlying HTMLInputElement and modify its .checked property:

$('.myCheckbox')[0].checked = true;
$('.myCheckbox')[0].checked = false;

The benefit to using the .prop() and .attr() methods instead of this is that they will operate on all matched elements.

jQuery 1.5.x and below

The .prop() method is not available, so you need to use .attr().

$('.myCheckbox').attr('checked', true);
$('.myCheckbox').attr('checked', false);

Note that this is the approach used by jQuery's unit tests prior to version 1.6 and is preferable to using $('.myCheckbox').removeAttr('checked'); since the latter will, if the box was initially checked, change the behaviour of a call to .reset() on any form that contains it – a subtle but probably unwelcome behaviour change.

For more context, some incomplete discussion of the changes to the handling of the checked attribute/property in the transition from 1.5.x to 1.6 can be found in the version 1.6 release notes and the Attributes vs. Properties section of the .prop() documentation.